A switching power unit and a high voltage direct current circuit breaker
A technology for switching power and power modules, which is applied in the field of high-voltage DC circuit breakers, can solve the problems of large branch stray inductance and long current flow path, and achieves the advantages of reducing stray inductance, increasing reliability, and reducing power device loss. Effect
Active Publication Date: 2021-01-22
BEIJING PINGGAO QINGDA TECH DEV CO LTD +3
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Problems solved by technology
[0008] The purpose of the present invention is to provide a switching power unit and a high-voltage DC circuit breaker, which are used to solve the problems of long current flow paths and large branch inductance when the existing switching power modules are crimped in series in one direction
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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] The present invention provides a high-voltage direct current circuit breaker, its structural schematic diagram is as follows figure 2 As shown, it includes the main branch, the transfer branch and the energy consumption branch connected in parallel, where multiple switching power units are arranged in series in the main branch and the transfer branch. The structural diagram of the switching power unit is shown in image 3 As shown, one or more arresters or other energy consuming devices are set in the energy consuming branch.
[0029] Such as image 3 As shown, the switching power unit of the present invention includes a forward power module and a reverse power module connected in series, that is, the installation polarity of the ...
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The invention relates to a switching power unit and a high-voltage DC circuit breaker. The switching power unit includes a forward power module and a reverse power module connected in series; The bridge arm and the full control device branch, the first bridge arm and the second bridge arm are formed by two uncontrolled device valve groups connected in series in the same direction, the full control device branch is equipped with a full control device, the first bridge arm The series connection point of the two uncontrolled device valve groups is the input / output end of the power module, and the series connection point of the two uncontrolled device valve groups of the second bridge arm is the output / input end of the power module; The setting direction of the control device valve group is opposite and the setting direction of the full control device is opposite. The invention effectively reduces the length of the current path and the stray inductance of the branch by adopting the forward and reverse series connection of the two power modules, thereby reducing the loss of the power device and increasing the reliability of the valve group.
Description
technical field [0001] The invention relates to a switching power unit and a high-voltage direct current circuit breaker, belonging to the technical field of high-voltage direct current circuit breakers. Background technique [0002] In recent years, the multi-terminal DC system has developed rapidly. Due to its good characteristics, the DC transmission network based on flexible DC transmission has become one of the hot spots in the international power field and will also be an important part of the future grid construction. DC circuit breakers with the ability to break large currents within a few milliseconds can quickly cut off faulty equipment or lines, which can ensure the stable operation of non-faulty parts of the DC system and greatly improve system reliability. Its engineering application marks a major breakthrough in my country's high-end DC equipment technology, which greatly promotes the construction of DC transmission and DC power grids in my country, and will pl...
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IPC IPC(8): H02M7/00H02M1/32
CPCH02M1/32H02M7/003H02M1/0054Y02B70/10
Inventor 张伟华武可程铁汉高树同魏义涛马俊海渠学景袁婷婷佀庚李华东
Owner BEIJING PINGGAO QINGDA TECH DEV CO LTD